Al Gore called Wednesday for “civil disobedience” to combat the construction of coal power plants Reuters reorted.The former vice president made the comment during a session at the fourth annual Clinton Global Initiative in Manhattan.

“If you’re a young person looking at the future of this planet and looking at what is being done right now, and not done, I believe we have reached the stage where it is time for civil disobedience to prevent the construction of new coal plants, Gore said, according to Reuters.

It wasn’t clear what specific action he intended by “civil disobedience,” which calls for the intentional violation of laws deemed to be unjust.